Why exercise capacity does not improve after pulmonary valve replacement.

摘要: Optimal timing of pulmonary valve replacement (PVR) for regurgitation is a debated topic. It logical that maximal aerobic capacity (VO2peak) would decline when PVR needed, but diminished VO2peak not always present before PVR, and previous studies show no improvement in after PVR. This study aimed to evaluate changes resting spirometry from pre- post-PVR sternotomy, determine the limiting factors whether lung function may explain lack surgery. For 26 patients (age, 19.7 ± 7.8 years) with history right ventricular outflow tract revision, prospectively evaluated echocardiograms, spirometry, exercise tests then an average 15 months Flow volume loops were reviewed by pulmonologist categorized as obstructive, restrictive, both obstructive or normal. Exercise interpreted using Eschenbacher’s algorithm primary exercise. No change was observed. Before many had abnormal functions (85 % abnormal), which unchanged (86 5 abnormal). The majority ventilatory limitation (66.7 %), whereas 28.5 cardiovascular limitation, 4.8 clear limitation. After 65.2 30.4 4.4 VO2peak. Pulmonary did up surgical frequency increase. effect on exercise-related symptoms must be considered this patient population. Improved cardiac hemodynamics are unlikely improve primarily pulmonary-limited patient.